/* ===== 轻工具箱 LiteToolbox - 共享样式 ===== */
:root{
  --primary:#2563eb;
  --primary-dark:#1d4ed8;
  --primary-light:#eff6ff;
  --accent:#0d9488;
  --bg:#f8fafc;
  --card:#ffffff;
  --text:#1e293b;
  --muted:#64748b;
  --border:#e2e8f0;
  --radius:14px;
  --radius-sm:10px;
  --shadow:0 1px 3px rgba(15,23,42,.06),0 1px 2px rgba(15,23,42,.04);
  --shadow-lg:0 10px 30px rgba(15,23,42,.08),0 4px 12px rgba(15,23,42,.04);
  --maxw:1080px;
  --ad-bg:#f1f5f9;
  --ok:#16a34a; --warn:#d97706; --err:#dc2626;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--text);line-height:1.65;font-size:16px;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;display:block}
h1,h2,h3{line-height:1.3;font-weight:700;letter-spacing:-.01em}
h1{font-size:1.9rem;margin-bottom:.5rem}
h2{font-size:1.35rem;margin:2rem 0 .8rem}
h3{font-size:1.1rem;margin:1.4rem 0 .5rem}
p{margin:.6rem 0}
ul,ol{margin:.6rem 0 .6rem 1.4rem}
code{background:#f1f5f9;padding:.15em .4em;border-radius:5px;font-size:.9em;font-family:"SF Mono",Consolas,"Roboto Mono",monospace}

/* ===== 顶栏 ===== */
.topbar{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--border);
}
.topbar-inner{max-width:var(--maxw);margin:0 auto;padding:.7rem 1.2rem;display:flex;align-items:center;gap:1rem}
.logo{display:flex;align-items:center;gap:.5rem;font-weight:800;font-size:1.15rem;color:var(--text)}
.logo:hover{text-decoration:none}
.logo-mark{width:30px;height:30px;border-radius:8px;background:linear-gradient(135deg,var(--primary),var(--accent));display:grid;place-items:center;color:#fff;font-size:1rem;flex-shrink:0}
.nav-links{display:flex;gap:.3rem;margin-left:auto;flex-wrap:wrap}
.nav-links a{color:var(--muted);font-size:.92rem;padding:.4rem .7rem;border-radius:8px;transition:.15s}
.nav-links a:hover{background:var(--primary-light);color:var(--primary);text-decoration:none}
.menu-btn{display:none;background:none;border:1px solid var(--border);border-radius:8px;padding:.4rem .6rem;cursor:pointer;font-size:1.1rem;color:var(--text)}

/* ===== 容器 ===== */
.container{max-width:var(--maxw);margin:0 auto;padding:0 1.2rem}
.wrap{padding:2rem 0 4rem}

/* ===== 面包屑 ===== */
.crumb{font-size:.85rem;color:var(--muted);margin:1rem 0 0}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--primary)}

/* ===== 工具页头部 ===== */
.tool-head{margin:1.5rem 0 1.2rem}
.tool-head .tag{display:inline-block;font-size:.78rem;font-weight:600;color:var(--accent);background:#f0fdfa;padding:.2rem .6rem;border-radius:20px;margin-bottom:.6rem}
.tool-head p.lead{color:var(--muted);font-size:1.05rem;max-width:60ch}

/* ===== 卡片工具区 ===== */
.tool-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:1.6rem;margin-bottom:1.2rem;
}
.drop-zone{
  border:2px dashed var(--border);border-radius:var(--radius-sm);padding:2.4rem 1.2rem;
  text-align:center;transition:.2s;cursor:pointer;background:#fcfdff;
}
.drop-zone:hover,.drop-zone.drag{border-color:var(--primary);background:var(--primary-light)}
.drop-zone .dz-icon{font-size:2.4rem;margin-bottom:.5rem}
.drop-zone .dz-title{font-weight:600;margin-bottom:.2rem}
.drop-zone .dz-sub{color:var(--muted);font-size:.9rem}
.drop-zone input[type=file]{display:none}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;gap:.4rem;justify-content:center;
  font-weight:600;font-size:.95rem;padding:.65rem 1.3rem;border-radius:10px;
  border:1px solid transparent;cursor:pointer;transition:.15s;text-decoration:none;
}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark)}
.btn-ghost{background:var(--card);border-color:var(--border);color:var(--text)}
.btn-ghost:hover{background:#f8fafc;border-color:var(--muted)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn-sm{padding:.45rem .9rem;font-size:.85rem}

/* ===== 表单控件 ===== */
label.field{display:block;margin-bottom:1rem}
label.field > span{display:block;font-weight:600;font-size:.9rem;margin-bottom:.3rem}
input[type=range]{width:100%;accent-color:var(--primary)}
select,input[type=text],input[type=number],textarea{
  width:100%;padding:.6rem .8rem;border:1px solid var(--border);border-radius:9px;
  font-size:.95rem;background:#fff;color:var(--text);font-family:inherit;
}
select:focus,input:focus,textarea:focus{outline:2px solid var(--primary);outline-offset:-1px;border-color:var(--primary)}
textarea{resize:vertical;min-height:140px;font-family:inherit}
.row{display:flex;gap:1rem;flex-wrap:wrap}
.row > *{flex:1;min-width:160px}
.chips{display:flex;flex-wrap:wrap;gap:.5rem}
.chip{padding:.4rem .9rem;border:1px solid var(--border);border-radius:20px;font-size:.88rem;cursor:pointer;background:#fff;transition:.15s}
.chip.active,.chip:hover{background:var(--primary);color:#fff;border-color:var(--primary)}

/* ===== 结果区 ===== */
.result{margin-top:1.2rem}
.result-item{
  display:flex;align-items:center;gap:1rem;padding:.9rem 1rem;border:1px solid var(--border);
  border-radius:var(--radius-sm);margin-bottom:.6rem;background:#fff;
}
.result-item .thumb{width:64px;height:64px;border-radius:8px;object-fit:cover;background:#f1f5f9;border:1px solid var(--border)}
.result-item .ri-info{flex:1;min-width:0}
.result-item .ri-name{font-weight:600;font-size:.92rem;word-break:break-all}
.result-item .ri-meta{font-size:.82rem;color:var(--muted)}
.compare{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-top:1rem}
.compare figure{margin:0;text-align:center}
.compare img{width:100%;border-radius:8px;border:1px solid var(--border)}
.compare figcaption{font-size:.82rem;color:var(--muted);margin-top:.3rem}
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:.8rem;margin:.8rem 0}
.stat{background:#f8fafc;border:1px solid var(--border);border-radius:10px;padding:.9rem;text-align:center}
.stat .n{font-size:1.5rem;font-weight:800;color:var(--primary)}
.stat .l{font-size:.82rem;color:var(--muted);margin-top:.1rem}

/* ===== 首页工具网格 ===== */
.hero{padding:3rem 0 2rem;text-align:center}
.hero h1{font-size:2.4rem;margin-bottom:.8rem}
.hero p.lead{color:var(--muted);font-size:1.1rem;max-width:52ch;margin:0 auto 1.4rem}
.hero-badges{display:flex;gap:.6rem;justify-content:center;flex-wrap:wrap;margin-top:1rem}
.hero-badges span{font-size:.85rem;color:var(--muted);background:#fff;border:1px solid var(--border);padding:.35rem .8rem;border-radius:20px}
.cat-title{font-size:1.1rem;font-weight:700;margin:2.2rem 0 1rem;display:flex;align-items:center;gap:.5rem}
.cat-title::before{content:"";width:4px;height:1.1em;background:var(--primary);border-radius:3px}
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:1rem}
.tool-tile{
  display:flex;flex-direction:column;gap:.4rem;padding:1.2rem;background:var(--card);
  border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);
  transition:.18s;color:var(--text);
}
.tool-tile:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:var(--primary);text-decoration:none}
.tool-tile .tt-icon{font-size:1.8rem}
.tool-tile .tt-name{font-weight:700;font-size:1.02rem}
.tool-tile .tt-desc{font-size:.85rem;color:var(--muted);line-height:1.5}
.tool-tile .tt-arrow{margin-top:auto;color:var(--primary);font-size:.85rem;font-weight:600}

/* ===== 广告位 ===== */
.ad-slot{background:var(--ad-bg);border:1px dashed #cbd5e1;border-radius:10px;display:flex;align-items:center;justify-content:center;color:#94a3b8;font-size:.78rem;min-height:90px;margin:1.2rem 0;text-align:center}
.ad-slot.ad-leader{min-height:100px}
.ad-slot.ad-inline{min-height:120px}
.ad-slot small{display:block}

/* ===== SEO 文本区 ===== */
.seo-box{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:1.6rem;margin-top:1.6rem}
.seo-box h2:first-child{margin-top:0}
.seo-box ul{color:var(--muted)}
.faq-item{border-bottom:1px solid var(--border);padding:.8rem 0}
.faq-item:last-child{border-bottom:none}
.faq-item summary{font-weight:600;cursor:pointer;list-style:none;font-size:1rem}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::before{content:"+ ";color:var(--primary);font-weight:800}
.faq-item[open] summary::before{content:"− "}
.faq-item p{color:var(--muted);margin-top:.5rem}

/* ===== 页脚 ===== */
footer{background:#0f172a;color:#cbd5e1;padding:2.4rem 0 1.6rem;margin-top:3rem}
footer .container{display:flex;flex-wrap:wrap;gap:1.5rem;justify-content:space-between;align-items:flex-start}
footer .foot-brand{max-width:300px}
footer .foot-brand .logo{color:#fff;margin-bottom:.5rem}
footer .foot-links{display:flex;gap:2rem;flex-wrap:wrap}
footer .foot-col h4{color:#fff;font-size:.9rem;margin-bottom:.6rem}
footer .foot-col a{display:block;color:#94a3b8;font-size:.88rem;margin-bottom:.35rem}
footer .foot-col a:hover{color:#fff}
footer .copy{width:100%;border-top:1px solid #1e293b;margin-top:1.5rem;padding-top:1rem;font-size:.82rem;color:#64748b;text-align:center}

/* ===== 提示条 ===== */
.toast{position:fixed;bottom:1.5rem;left:50%;transform:translateX(-50%) translateY(120%);background:#1e293b;color:#fff;padding:.7rem 1.3rem;border-radius:10px;font-size:.9rem;box-shadow:var(--shadow-lg);transition:.3s;z-index:200;max-width:90vw}
.toast.show{transform:translateX(-50%) translateY(0)}

/* ===== 响应式 ===== */
@media(max-width:720px){
  h1{font-size:1.6rem}
  .hero h1{font-size:1.9rem}
  .nav-links{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;flex-direction:column;padding:.6rem;border-bottom:1px solid var(--border);box-shadow:var(--shadow-lg)}
  .nav-links.open{display:flex}
  .nav-links a{padding:.7rem .9rem}
  .menu-btn{display:block;margin-left:auto}
  .tool-card{padding:1.1rem}
  .compare{grid-template-columns:1fr}
  .row > *{min-width:100%}
}